Loud speaker with horizontal radiation pattern

Abstract

A siren having one or more stacked speakers, each speaker having a substantially circular lower horn member having an upwardly facing surface including a substantially convex annular portion and a substantially concave central cavity portion. A substantially circular upper horn member having a downwardly facing surface including a substantially convex annular outer portion and a central opening, is spaced above the lower horn member, thereby defining an annular, radially outwardly diverging sound director between the upper and lower horn members. A diffuser horn is coupled to a central opening in the upper horn member and projects downwardly into the cavity portion of the lower horn member. A siren driver is mounted in the upper horn member adjacent to the central opening for projecting a sound wave through the diffuser horn into the cavity, where the sound wave is reflected upwardly out of the cavity into the sound director, through which the sound is projected horizontally in a 360° pattern. A frame-like support system includes a plurality of vertical columns, each formed by connecting discrete support segments to one another, each support segment also being connected to an upper and a lower horn member. The siren driver includes a laminated, epoxied cloth for holding down the leads in intimate contact along the curvature or the diaphragm.